Mixed afforestation decreased soil organic carbon content but improved the carbon stability in the initial stage of afforestation

The results revealed that abandoned farmland land had the greatest POC/SOC ratio, while three mixed forests had greater MAOC/SOC ratios than POC/SOC in the 0–20 cm layer. High CPMI and SOC fraction contents were found in DBF. Although mixed afforestation decreased SOC content, it improved the stability of SOC.

研究结果表明，废弃农田的土地拥有最高的POC/SOC比率，而三种混合林在0-20厘米层中的MAOC/SOC比率高于POC/SOC。在DBF中发现了高CPMI和SOC分数含量。尽管混合造林降低了SOC含量，但提升了SOC的稳定性。